This is absolutely the kind of stuff people bring up in therapy. I'm glad you're thinking of opening up about some of this. Writing it down on notes is a good idea if you have trouble saying things out loud. Also, I have told my T things while my voice wobbled, tears were coming out and my heart rate was extremely high, but I did get them out and it was a good thing. Many times (not always), once I had talked about something once, I could refer to it later without so much trouble.

Your T will be able to handle it, and I suspect will be relieved that you are telling her these things rather than keeping them inside. Those don't sound like easy things to get past... I think you could use your T's help and that's exactly what she's there for.